Radiator valve



March 16 1926.

I CONROYD RADIATOR VALVE Filed Dec. 22, 1921 l atentecl Mar. 16 1926.

, UNITED STATES PATENT OFFICE.

JAMES CONROYD, OF CHICAGO, ILLINOIS.

RADIATOR VALVE.

Application filed December 22, 1921. Scrial No. 524,334.

To all whom it may concern Be it known that I, JAMEs CONROYD, a citizenof the United States, residing at Chicago, in the county of Cook andState of Illinois, have invented a certain new and useful Improvement inRadiator Valves, of

which the following is a specification.

, This invention relates 'to a radiator valve construction andparticularly to a float'and float assembly'for such valves. It has forone object to provide means which will prevent the float from beingdrawn down upon its seat by the suction within the system when the.level of water within the float chamber has actually risen to a pointwhere diagrammatically in the accompanying drawings, wherein:

' Figurel is a vertical cross section of the valve and float chamberwith the float in elevation; g

Fig.2 isa section taken on line 2-2 of Fig. 1;

Fig. 3 is a view in elevation'with parts in section and parts brokenaway showing a modified form. Y

Like parts are designated bylike characters throughout.

A is a valve housing having a central float chamber A an inlet passage Aand a discharge passage A Mounted within the discharge passage is thevalve seat A. The top of the valve housing is open and is adapted to beclosed by the screw threaded cap A which is hollow as at A as shown. Thecap is .provided with a perforation A which communicates with the floatchamber and a plurality of perforations A Adjacent the perforations Awhen, the cap is screwed in place as shown in the figures is a segmentalcavity A. Communicating at one end with this cavity A and at the otherwith the discharge passage A is a passage A The lower section of the capA is perforated as at A and provided with the upwardly extending boss Aabout such perforation.

B is a connection of any suitable type by means of which water from theradiator is introduced into the float chamber. Vithin the float chamberis mounted afloat C. Positioned centrally within this float is a hollowtube C which lies normally Within the perforation A of the cap A. At itslower end the tube is narrowed and provided with the beveled portion Cwhich is adapted to be seated in the valve seat A to close the valve toprevent discharge of water through the valve and over the seat A but 0into the passage A thus balancing the suction and pressure.

In the form shown in Figure 3 the upwardly extending boss A is omittedand in its place a downwardly extending boss A about the perforation Ais substituted.

In this form also the tube C is enlargedand surrounds the boss A The useand operation of my invention are as follows:

When the water level is not sufficient to raise the float, the floatremains seated as shownparticularly in Figure 1. hen the water levelrises sufficiently to raise the float,

the float is unseated and discharge of water takes place until the levelis sufliciently reduced to allow the float again to become seated andprevent further discharge.

With such: systems there is always a considerable degree of suction inthe discharge pipe and such suction tends to hold the float "down inopposition to its natural buoyancy and to hold it seated after the waterlevel has become such as normally to raise the valve, and thus dischargeof water at the proper time is prevented and the operation of the valveis unsatisfactory. This tendency in valves of this type is so wellrecognized that practically every such valve now on the market isprovided with a bypass by the manipulation of which the float chambermay be cut out. and the water may be caused to flow directly from theradiator to the discharge port and thus discharge of water from theradiator is entirely independent from the float or operation of thevalve.

In my invention I provide means whereby the suction in the dischargeline may be balanced. Thus through the air passage at the side whichconnnunicates with the hollow cap at the top of the valve and throughthe hollow tube in the end of the valve air may be drawn either directlythrough the valve or through the passage at the side of the valve, eachof which is in communication with the interior of the float to permitpassage of steam through the tube chamber. liv means oi. thisarrangement it is impossible to set up such unbalanced surtion as willhold the valve on its seat in opposititm to its normal lnioyanev, andthus the operation of the valve is eiiected only by the variation ot thewater level and is cntirely independent of the suction in the dis chargeline or elsewhere in the system.

I claim:

1. The combination of a radiator valve havim a float chamber, waterinlet and outlet ports communicating with such chamber, a float valve insuch chamber, with a pair of indepemlent air conduits communicating withsuch float chamber and with the dis charge from the valve, one of suchconduits l yint, within but normally separated throughout its lengthfrom such float chamber, and the other conduit lying wholly outside thefloat chamber.

2. The combination of a radiator valve having a float chamber, waterinletand outlet ports communicating, with such chamber, a float valve insuch chamber, with a pair oi? independent air conduits communicatingwith such float chamber and with the discharge from the valve, one ofsuch conduits lying within but normally separated throughout its lengthfrom such float chamber, and the other conduit lying wholly outside thefloat chamber, said first mentioned conduit passing through said float.

In a radiator valve a float chamber, water inlet and outlet openingscommunicating' with such chamber, a water discharge connection belowsuch water outlet opening, a hollow cap adapted to close such floatchamber, and a free communication from the interior of such valvechamber to the interior of such cap, and a pair of air comnumicationconduits from the interior of said cap to such discharge connectionbeneath said outlet opening.

4-. In a radiator valve a valve casing provided with a float chamber, anopening in the bottom of said casing communicating with said floatchamber, a ater free air passage communicating with said opening at alltimes and communicating with the floatchamber at its top, said floatchamber pro vided with a connection for a' radiator, whereby thecontents of the radiator may flow into the float chamber, and a valvestem within said float chamber adapted to close the bottom opening, toprevent discharge from the float chamber, said valve stem being hollowand provided with a connection independent of the float chamber andthrough it whereby air may circulate, and the float adapted to controlsaid valve in response to variation in the level of liquid in the:asing.

5. In a radiator valve, a valve casing provided with a float chamber, aninlet opening and a discharge opening for said float chamber-,a float insaid float chamber provided with a valve partadapted to be seated in thedischarge opening and to control discharge therethrough, and means forbalancing suction on said valve and float comprising a liquid free airpassage through said valve and float, and an additional liquid free airpassage communicating with the top of said valve casing and with theoutlet eonneetion of said valve at a point independent of said valveseat.

Signed at Chicago, county of Cook and State of Illinois, this 20th dayof December,

JAMES CONBOYD.

